blob: 30d1b3358f59980be719471a2bf22ceffd4534f5 [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Implementation of a fake VideoCaptureDevice class. Used for testing other
// video capture classes when no real hardware is available.
#include <string>
#include "base/atomicops.h"
#include "base/memory/scoped_ptr.h"
#include "base/threading/thread.h"
#include "base/threading/thread_checker.h"
#include "media/video/capture/video_capture_device.h"
namespace media {
class MEDIA_EXPORT FakeVideoCaptureDevice : public VideoCaptureDevice {
static const int kFakeCaptureTimeoutMs = 50;
~FakeVideoCaptureDevice() override;
// VideoCaptureDevice implementation.
void AllocateAndStart(const VideoCaptureParams& params,
scoped_ptr<VideoCaptureDevice::Client> client) override;
void StopAndDeAllocate() override;
// Sets the formats to use sequentially when the device is configured as
// variable capture resolution. Works only before AllocateAndStart() or
// after StopAndDeallocate().
void PopulateVariableFormatsRoster(const VideoCaptureFormats& formats);
// Called on the |capture_thread_| only.
void OnAllocateAndStart(const VideoCaptureParams& params,
scoped_ptr<Client> client);
void OnStopAndDeAllocate();
void OnCaptureTask();
void Reallocate();
// |thread_checker_| is used to check that destructor, AllocateAndStart() and
// StopAndDeAllocate() are called in the correct thread that owns the object.
base::ThreadChecker thread_checker_;
base::Thread capture_thread_;
// The following members are only used on the |capture_thread_|.
scoped_ptr<VideoCaptureDevice::Client> client_;
scoped_ptr<uint8[]> fake_frame_;
int frame_count_;
VideoCaptureFormat capture_format_;
// When the device is allowed to change resolution, this vector holds the
// available ones, used sequentially restarting at the end. These two members
// are initialised in PopulateFormatRoster() before |capture_thread_| is
// running and are subsequently read-only in that thread.
std::vector<VideoCaptureFormat> format_roster_;
int format_roster_index_;
} // namespace media